// ignore_for_file: prefer_const_constructors, prefer_const_literals_to_create_immutables, file_names, use_build_context_synchronously, library_private_types_in_public_api

import 'package:flutter/material.dart';
import 'package:smilet/Aktivitet/NewActivity.dart';
import 'package:smilet/Aktivitet/Participate.dart';
import 'package:smilet/LoginPage.dart';
import 'package:smilet/User.dart';
import 'dart:async';
import 'dart:convert';
import 'package:http/http.dart' as http;
import 'package:weather_icons/weather_icons.dart';

class Activity extends StatefulWidget {
  final String schoolName;
  final User user;
  const Activity({super.key, required this.schoolName, required this.user});

  @override
  _ActivityState createState() => _ActivityState();
}

class _ActivityState extends State<Activity> {
  @override
  Widget build(BuildContext context) {
    var futureBuilder = FutureBuilder(
      future: _getActivities(user.getUsername().toString()),
      builder: (BuildContext context, AsyncSnapshot snapshot) {
        switch (snapshot.connectionState) {
          case ConnectionState.none:
            return _emptyActivities(context, snapshot);
          case ConnectionState.waiting:
            return _emptyActivities(context, snapshot);
          default:
            if (snapshot.hasError) {
              return Text('snapshot error ${snapshot.error.toString()}');
            } else if (snapshot.hasData) {
              return _generateActivities(context, snapshot);
            } else {
              return _emptyActivities(context, snapshot);
            }
        }
      },
    );

    return Center(
        child: Column(children: <Widget>[
      SizedBox(height: 15),
      Text('Dina kommande aktiviteter',
          style: TextStyle(
            color: Colors.white,
            fontSize: 25,
            fontWeight: FontWeight.bold,
          )),
      Expanded(child: futureBuilder),
      Row(
        mainAxisAlignment: MainAxisAlignment.center,
        children: [
          Padding(
            padding: const EdgeInsets.all(10.0),
            child: SizedBox(
              height: 70,
              width: 150,
              child: ElevatedButton(
                  onPressed: () {
                    Navigator.push(
                        context,
                        MaterialPageRoute(
                            builder: (context) => NewActivity(user: user)));
                  },
                  child: Text('Skapa aktivitet')),
            ),
          ),
          Padding(
            padding: const EdgeInsets.all(10.0),
            child: SizedBox(
                height: 70,
                width: 160,
                child: ElevatedButton(
                    onPressed: () {
                      Navigator.push(
                          context,
                          MaterialPageRoute(
                              builder: (context) => Participate(
                                    user: user,
                                  )));
                    },
                    child: Text('Delta i aktivitet'))),
          )
        ],
      ),
    ]));
  }

  Widget _generateActivities(BuildContext context, AsyncSnapshot snapshot) {
    List<dynamic> items = snapshot.data;
    if (items.isEmpty) {
      return Center(
        child: Text(
          "Inga kommande aktiviteter!",
          style: TextStyle(fontSize: 20),
        ),
      );
    } else {
      return ShaderMask(
        shaderCallback: (Rect rect) {
          return LinearGradient(
            begin: Alignment.topCenter,
            end: Alignment.bottomCenter,
            colors: [
              Colors.green,
              Colors.transparent,
              Colors.transparent,
              Colors.green
            ],
            stops: [0.0, 0.01, 0.9, 0.99],
          ).createShader(rect);
        },
        blendMode: BlendMode.dstOut,
        child: ListView.separated(
          padding: const EdgeInsets.all(8),
          itemCount: items.length + 1,
          itemBuilder: (BuildContext context, int index) {
            if (index == 0) {
              return Container();
            } else {
              Map map = items[index - 1];
              int id = map["id"];
              String title = map["title"].toString();
              String place = map["place"].toString();
              int dayIndex = 8;
              int monthIndex = 5;
              String dateTime = map["dateTime"];

              // Filtrera bort 0 från månad
              if (dateTime.substring(5, 7).startsWith("0")) {
                monthIndex = 6;
              }

              // Filtrera bort 0 från dag
              if (dateTime.substring(8, 10).startsWith("0")) {
                dayIndex = 9;
              }

              String date =
                  "${dateTime.substring(dayIndex, 10)}/${dateTime.substring(monthIndex, 7)}";
              String time = dateTime.substring(11, 16);
              String creatorUser = map["creatorUser"].toString();
              int amountRegistered = map["amountRegistered"];
              String schoolCode = map["schoolCode"];

              return Container(
                padding: const EdgeInsets.all(8),
                decoration: BoxDecoration(
                  color: Color.fromARGB(255, 255, 255, 255),
                  borderRadius: BorderRadius.all(Radius.circular(20)),
                ),
                child: Column(
                  children: <Widget>[
                    SizedBox(height: 5),

                    // Väderapi row, anropar metod som anropar metoder = return Row()
                    _weather(schoolCode, dateTime),
                    SizedBox(height: 5),
                    Divider(
                      height: 1,
                      color: Colors.grey,
                    ),
                    SizedBox(height: 5),
                    Row(
                      children: <Widget>[
                        Expanded(
                          child: Text(
                            title,
                            textAlign: TextAlign.left,
                            style: TextStyle(
                                fontSize: 30,
                                fontWeight: FontWeight.bold,
                                color: const Color.fromARGB(255, 0, 0, 0)),
                          ),
                        ),
                        Padding(
                          padding: const EdgeInsets.only(right: 10),
                          child: Text(
                            date,
                            textAlign: TextAlign.right,
                            style: TextStyle(
                                fontSize: 30,
                                fontWeight: FontWeight.bold,
                                color: const Color.fromARGB(255, 0, 0, 0)),
                          ),
                        ),
                      ],
                    ),
                    Row(
                      children: <Widget>[
                        Expanded(
                          child: Text(
                            place,
                            textAlign: TextAlign.left,
                            style: TextStyle(
                                fontSize: 20,
                                color: const Color.fromARGB(255, 0, 0, 0)),
                          ),
                        ),
                        Padding(
                          padding: const EdgeInsets.only(right: 10),
                          child: Text(
                            time,
                            textAlign: TextAlign.right,
                            style: TextStyle(
                                fontSize: 20,
                                color: const Color.fromARGB(255, 0, 0, 0)),
                          ),
                        ),
                      ],
                    ),
                    SizedBox(
                      height: 5,
                    ),
                    Row(
                      children: <Widget>[
                        Expanded(
                          child: Text(
                            "Skapare: $creatorUser",
                            textAlign: TextAlign.left,
                            style: TextStyle(
                                fontSize: 15,
                                color: const Color.fromARGB(255, 0, 0, 0)),
                          ),
                        ),
                        Padding(
                          padding: const EdgeInsets.only(right: 10),
                          child: Text(
                            "Antal deltagare: ${amountRegistered.toString()}",
                            textAlign: TextAlign.right,
                            style: TextStyle(
                                fontSize: 15,
                                color: const Color.fromARGB(255, 0, 0, 0)),
                          ),
                        ),
                      ],
                    ),
                    SizedBox(
                      height: 5,
                    ),
                    Row(
                      children: <Widget>[
                        if (creatorUser != user.getUsername())
                          Expanded(
                            child: ElevatedButton(
                                style: TextButton.styleFrom(
                                  backgroundColor:
                                      Color.fromARGB(255, 249, 138, 11),
                                ),
                                child: Text(
                                  "Avanmäl",
                                  style: TextStyle(color: Colors.white),
                                ),
                                onPressed: () async {
                                  await _removeUserFromActivity(
                                      id, user.getUsername());
                                  setState(() {});
                                }),
                          ),
                        if (creatorUser == user.getUsername())
                          Expanded(
                            child: ElevatedButton(
                                style: TextButton.styleFrom(
                                  backgroundColor:
                                      Color.fromARGB(255, 233, 52, 52),
                                ),
                                child: Text(
                                  "Ta bort aktivitet",
                                  style: TextStyle(color: Colors.white),
                                ),
                                onPressed: () async {
                                  await _removeActivity(id);
                                  setState(() {});
                                }),
                          ),
                      ],
                    )
                  ],
                ),
              );
            }
          },
          separatorBuilder: (BuildContext context, int index) =>
              const Divider(),
        ),
      );
    }
  }

  Widget _emptyActivities(BuildContext context, AsyncSnapshot snapshot) {
    return Center(child: CircularProgressIndicator());
  }

  Future<List> _getActivities(String username) async {
    var response = await http.get(
        Uri.parse('https://group-15-3.pvt.dsv.su.se/activity/user/$username'));
    if (response.statusCode == 200) {
      // If the server did return a 200 OK response,
      // then parse the JSON.
      return jsonDecode(utf8.decode(response.bodyBytes)) as List<dynamic>;
    } else {
      // If the server did not return a 200 OK response,
      // then throw an exception.
      throw Exception();
    }
  }

  Future<void> _removeUserFromActivity(int id, String username) async {
    var response = await http.get(Uri.parse(
        'https://group-15-3.pvt.dsv.su.se/activity/update?id=$id&username=$username&remove=true'));
    if (response.statusCode == 200) {
      // If the server did return a 200 OK response,
      // then parse the JSON.
    } else {
      // If the server did not return a 200 OK response,
      // then throw an exception.
      throw Exception();
    }
  }

  Future<void> _removeActivity(int id) async {
    var response = await http
        .get(Uri.parse('https://group-15-3.pvt.dsv.su.se/activity/remove/$id'));
    if (response.statusCode == 200) {
      // If the server did return a 200 OK response,
      // then parse the JSON.
    } else {
      // If the server did not return a 200 OK response,
      // then throw an exception.
      throw Exception();
    }
  }

  Future<Map<String, dynamic>> _checkApi(String five) async {
    var response = await http.get(Uri.parse(five));
    if (response.statusCode == 200) {
      // If the server did return a 200 OK response,
      // then parse the JSON.
      return jsonDecode(response.body) as Map<String, dynamic>;
    } else {
      // If the server did not return a 200 OK response,
      // then throw an exception.
      throw Exception;
    }
  }

  Widget _weather(String schoolCode, String dateTime) {
    String fiveSthlm =
        'https://api.openweathermap.org/data/2.5/forecast?lat=59.334591&lon=18.063240&appid=cc1aa0082d9d3ec25f5d1007e1014725&units=metric';
    String fiveUppsala =
        'https://api.openweathermap.org/data/2.5/forecast?lat=59.858227&lon=17.632252&appid=cc1aa0082d9d3ec25f5d1007e1014725&units=metric';
    String schoolUrl;
    if ((schoolCode == 'dXUtZGF0YQ') || (schoolCode == 'dXUtYmlv')) {
      schoolUrl = fiveUppsala;
    } else {
      schoolUrl = fiveSthlm;
    }
    var weatherBuilder = FutureBuilder(
      future: _checkApi(schoolUrl),
      builder: (BuildContext contextTwo, AsyncSnapshot snapshotTwo) {
        switch (snapshotTwo.connectionState) {
          case ConnectionState.none:
            return Text('none');
          case ConnectionState.waiting:
            return Text('Laddar');
          default:
            if (snapshotTwo.hasError) {
              return Text('error'); //${snapshot.error}
            } else if (snapshotTwo.hasData) {
              return _weatherBuilder(contextTwo, snapshotTwo, dateTime);
            } else {
              return Text('null');
            }
        }
      },
    );
    return weatherBuilder;
  }

  Widget _weatherBuilder(
      BuildContext contextTwo, AsyncSnapshot snapshotTwo, String dateTime) {
    Map<String, dynamic> itemsTwo = snapshotTwo.data;
    List<dynamic> list = [];
    String temp = '';
    String weather = '';
    String weatherCloud = '';

    for (int i = 0; i < itemsTwo["cnt"]; i++) {
      int difference = DateTime.parse(itemsTwo["list"][i]["dt_txt"])
          .difference(DateTime.parse(dateTime))
          .inHours;
      if (difference <= 1 && difference >= -1) {
        list.add(itemsTwo["list"][i]);
      }
    }

    if (list.isNotEmpty) {
      temp = "${list[0]["main"]["temp"].round()}\u2103";
      weather = list[0]["weather"][0]["main"];
      weatherCloud = list[0]["weather"][0]["description"];
    }

    IconData icon;
    MaterialColor color;
    if (weather == "Clear") {
      icon = Icons.sunny;
      color = Colors.yellow;
    } else if (weather == "Rain") {
      icon = Icons.cloudy_snowing;
      color = Colors.blue;
    } else if (weather == "Thunderstorm") {
      icon = Icons.thunderstorm;
      color = Colors.blue;
    } else if (weather == "Snow") {
      icon = Icons.snowing;
      color = Colors.lightBlue;
    } else if (weather == "Drizzle") {
      icon = Icons.water_drop;
      color = Colors.blue;
    } else {
      if (weatherCloud.contains('few')) {
        icon = WeatherIcons.day_cloudy;
        color = Colors.grey;
      } else if (weatherCloud.contains('scattered')) {
        icon = WeatherIcons.cloud;
        color = Colors.grey;
      } else if (weatherCloud.contains('broken')) {
        icon = WeatherIcons.cloudy;
        color = Colors.grey;
      } else {
        icon = Icons.cloud;
        color = Colors.grey;
      }
    }

    if (list.isNotEmpty) {
      return Row(
        children: <Widget>[
          Padding(
              padding: EdgeInsets.only(left: 5),
              child: Icon(
                Icons.event,
                color: Color.fromARGB(255, 249, 138, 11),
              )),
          Expanded(
              child: Text(
            temp,
            textAlign: TextAlign.right,
            style: TextStyle(fontSize: 20, color: Colors.black),
          )),
          Padding(
              padding: const EdgeInsets.only(right: 10, left: 10),
              child: Icon(
                icon,
                color: color,
                size: 30,
              ))
        ],
      );
    } else {
      return Row(children: <Widget>[
        Padding(
            padding: EdgeInsets.only(left: 5),
            child: Icon(
              Icons.event,
              color: Color.fromARGB(255, 249, 138, 11),
            )),
        Expanded(
            child: Text(
          '',
          textAlign: TextAlign.right,
          style: TextStyle(fontSize: 20, color: Colors.black),
        )),
        Padding(
            padding: const EdgeInsets.only(right: 10, left: 10),
            child: Icon(
              Icons.error,
              color: Color.fromARGB(255, 249, 138, 11),
              size: 30,
            ))
      ]);
    }
  }
}